CONVERTER.........
Needs 120V AC power going IN before 12V DC power can come out.
Have you checked that it is getting 120V AC power? Could be a tripped GFCI outlet, could be a tripped AC circuit breaker.
IF no 120V AC IN.........then NO 12V DC OUT
IF you find 'converter' has 120V AC then converter has failed
You also need a new battery.
Mark batteries cables (or take pics) before disconnecting so that they don't get connected backwards. IF backwards then you will need to replace REVERSE POLARITY fuses on backside of converter---they blow when battery hooked up wrong
